The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents considerations on the possibility to use thermoelectric generators at low temperatures to recover waste heat recovery applications, especially from geothermal energy. Thermoelectric generators have a satisfactory efficiency, when they are usually used in conditions with high gradient of temperatures. However, there are many applications, which lose important quantities of energy...
The performance of the hybrid structures PV/TEG/STC which consist of photovoltaic cells PV, thermoelectric elements TEG and solar collector STC is studied in this paper function of different levels of illumination from 30 suns to 130 suns (1 sun = 1000 W/m2). The concentrated light is obtained using a solar simulator with four parabolic xenon lamps and an optical mixer to ensure the quasi homogenous...
The paper contemplated the possibility of using the power thermobattery with special converters that operate from voltages in the tens of millivolts. Two such converters have been developed; their characteristics have been measured and documented. The only thermobattery with such a converter is able to supply low-power devices from the temperature difference of one tenth of a degree Celsius.
Construction and technology of multisectional thermoelements for generators working at the temperatures up to 1200 K were developed. Semiconductor materials with increased dimensionless thermoelectric figure of merit (ZT up to 1.4) were proposed for the fabrication of thermoelement sections. Complex investigations of thermal and electrical parameters for thermoelectric materials were carried out....
This paper presents an energy harvesting system for adaptation with thermoelectric generators (TEG). The TEG system is a dc power source based on Seebeck effect, which utilizes the temperature gradient between hot and cold sides of the TEG module. The output voltage is highly dependent on temperature difference. A DC-DC converter is needed to regulate the output power of the TEG and to actively track...
In this paper, a calibrated temperature difference sensor transducer is newly proposed for monitoring environmental temperature difference applications. The output signal is a pulse stream, and thus it could be easily sent over a wide range of transmission media, such as package switch network, radio, optical, infrared, ultrasonic, and so on. Another innovation is that the proposed calibration method...
The output voltage characteristics of a thermoelectric generator were analyzed to suppress heat leakage for low-temperature waste-heat thermoelectric generation. The experimental results show that the pre-cooled thermoelectric device output a higher voltage than the reference device. The experimental results also show that the influence of heat leakage took a longer time to appear using the pre-cooled...
The goal of this paper is to introduce an experimental monitoring system for thermoelectric generator modules. This system consists in using thermoelectric generator devices for producing electrical power. Also it monitors some parameters of a thermoelectric generator such as the temperature of its cold side, the temperature of its hot side, the output voltage, the output current. The system is able...
This paper presents a preliminary study of electricity generation using Peltier modules. Ceramic thermoelectric cooling module (Peltier module), TEC1-12710 model, was used as electricity generation. The experimental box is a hardwood box and the inside is an aluminium box, which consists of hot and cold sides. The temperatures in a hot side and a cold side were controlled by using heater and dry ice,...
This paper proposes a test rig design to test thermoelectric generators. It outlines the design process and the selection of utilized materials. Selection of the heat source, design of the heater platform, and temperature control and monitoring are all outlined. A LabVIEW interface is developed for this purpose and a TEG is tested. Results show that the desired temperature is reached though at a slow...
This paper presents the study and modeling of a thermoelectric generator module, type TG 100. The identification of TEG's main parameters are presented. The method used is experimental and combined with a FEMM simulation. For the first time the main thermal parameters are measured and the results are compared with the simulation results and catalog data. After analyzing the measured data, results...
In the paper a case study of prototype wireless sensor nodes (WSN) constituting an autonomous wireless link based on ZigBee transceivers and supplied with thermoelectric generators (TEG) harvesting waste industrial heat is presented. Depending on the available power, different working scenarios of the coupled TEG and WSN are considered. Simulation data concerning estimated available electrical power...
Pyroelectric generators (PEGs) present a potential alternative to thermoelectric generators (TEGs), to generate electric power from thermal fields. Pyroelectric generators have a predicted upper limit of 50 % of the Carnot's efficiency, which exceeds that of TEGs. However, PEGs require an oscillating thermal field or thermal vibrations. Such vibrations are rare in technical systems, hindering their...
Sun supplies the purest energy available on the Earth. Hungary and Serbia seems to be even further from this energy source free from CO2 emission, since in spite of the fact that, these states has excellent geographical features neither our present governments non supports this issue to a sufficient extent. A correct purchase price of solar energy should be determined in harmony with the European...
This paper seeks to demonstrate the performance of a thermoelectric energy recovery module (TERM). The TERM aims to convert the waste heat from power amplifier (PA) transistors into the useful power. The TERM contains a thermoelectric generator (TEG), a heat spreader, and a heat sink. A first order prototype of the TERM is generated and used as a test vehicle. Experimental setup mainly consists of...
This study describes use of a thermoelectric power converter to transform waste heat into electrical energy to power an RF receiver and transmitter, for use in harsh environment wireless temperature sensing and telemetry. The sensing and transmitting module employs a DS-1820 low power digital temperature sensor to perform temperature to voltage conversion, an ATX-34 RF transmitter, an ARX-34 RF receiver...
The paper presents a comparative analysis of three different electrothermal models of a thermoelectric generator (TEG) implemented in SPICE. It starts from a model that is based on the constant parameters theory. Next, the one that takes into account a mean temperature at the both sides of the thermogenerator is described. Finally, an improved model is shown that calculates the values of parameters...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.